Summarize YouTube video transcripts in Discord with Gemini and Supabase — n8n Workflow

High complexity Trigger19 nodes🤗 Support👁 1 viewsby Tristan V

Overview

YouTube Video Transcript Summarizer — Discord Bot

> Paste a YouTube URL into a Discord channel and this workflow automatically extracts the transcript, uses an LLM to generate a concise summary, and stores everything in a database — all in seconds.

> Self-hosted n8n only. This workflow uses the Execute Command node to run yt-dlp inside the n8n container. This requires shell access, which is only available on self-hosted instances (Docker, VPS, etc.) — it will not work on n8n Cloud.

Impo

Nodes used

DiscordSupabaseCodeGoogle Gemini

Workflow Preview

YouTube Video Summarizer — Discord Bot
Who is this for?
Teams or creators who want to automatically summarize Y
What does it do?
- Listens for YouTu
1. Trigger & URL Detection
Listens for every message in the configured Discord cha
How it works:
1. Discord Trigger fires on every new message
2.
2. Video Data Extraction
Runs yt-dlp to download subtitles and fetch video metad
How it works:
1. yt-dlp downloads auto-generated English subtitles (.
3. Transcript Processing
Reads the .vtt subtitle file and cleans it into plain t
How it works:
1. `cat` reads the VTT file (continueOnFail enabled)
2. Parse Transcript strips timestamps,
4. AI Summarization
Sends the clean transcript to Gemini 2.5 Flash for a co
How it works:
1. Gemini receives title, channel, and full transcript
2. Returns 3-5 paragraphs of pro
5. Save & Notify
Persists data to Supabase and replies in Discord.
How it works:
1. Save to Supabase inserts all fields into the `videos
2. Prepare Success Log builds a run record (sta
6. Error Handling
Catches any workflow crash and replies in Discord with
How it works:
1. Error Trigger fires on any unhandled node failure
2. Prepare Error Data classifies
Discord Bot Setup
1. Go to Discord Developer Portal
2. Create a new Application → Bot
3. Enable Message Content Intent under Privileged Inten
Gemini API Setup
1. Go to Google AI Studio
2. Click Create API Key
3. Copy the key
4. In n8n: Click the Gemini node → Credential → Create
5. Paste yo
Supabase Setup
1. Create a project at supabase.com
2. Go to Settings → API → copy the URL and anon key
3. In n8n: Create Supabase credential with URL + API ke
4.
Extract YouTube URL
D
Discord Trigger
I
Is YouTube URL?
Y
yt-dlp Get Metadata
Parse Metadata
R
Read Subtitle File
Parse Transcript
Message a model
Prepare Insert Data
Save to Supabase
Prepare Success Log
Log Run
Discord Reply
Discord Not YouTube Reply
E
Error Trigger
Prepare Error Data
Log Run Error
Discord Error Reply
Prepare Messages for Dis…
19 nodes17 edges

How it Works

  1. 1

    Trigger

    The workflow starts with a trigger trigger.

  2. 2

    Process

    Data flows through 19 nodes, connecting code, discord, errortrigger.

  3. 3

    Output

    The workflow completes its automation and delivers the result to the configured destination.

Node Details (19)

DI

Discord

discord

#1
SU

Supabase

supabase

#2
CO

Code

code

#3
GO

Google Gemini

n8n-nodes-langchain.googleGemini

#4

How to Import This Workflow

  1. 1Click Download JSON button on the right to save the workflow file.
  2. 2Open your n8n instance. Go to Workflows → New → Import from file.
  3. 3Select the downloaded summarize-youtube-video-transcripts-in-discord-with-gemini-and-supabase file and click Import.
  4. 4Set up credentials for each service node (API keys, OAuth, etc.).
  5. 5Click Test Workflow to verify everything works, then activate it.

Or paste directly in n8n → Import from JSON:

{ "name": "Summarize YouTube video transcripts in Discord with Gemini and Supabase", "nodes": [...], ...}

Integrations

codediscorderrortriggerexecutecommandgooglegeminiifn8n-nodes-discord-trigger.discordtriggersupabase

Get This Workflow

Download and import in one click

Download JSONView on n8n.io
Nodes19
Complexityhigh
Triggertrigger
Views1
CategorySupport

Created by

Tristan V

Tristan V

@tristanv

Tags

codediscorderrortriggerexecutecommandgooglegeminiifn8n-nodes-discord-trigger.discordtriggersupabase

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